Hot melting connecting structure between metal-plastic composite pipes and manufacturing method of hot melting connecting structure

Abstract

The invention relates to a hot melting connecting structure between metal-plastic composite pipes and a manufacturing method of the hot melting connecting structure. Any two adjacent metal-plastic composite pipes are connected through a middle hot melting connecting piece (6) which comprises a plastic pipe body; a layer of 304 stainless steel lining (61) is fixed to the inner wall of each plastic pipe body; a front end insertion fixing groove (62) and a rear end insertion fixing groove are (63) formed in the front end and the rear end of each plastic pipe body respectively; and the tail end of one metal-plastic composite pipe is located in the front end insertion fixing groove (62), and the tail end of the other metal-plastic composite pipe is located in the rear end insertion fixing groove (63) correspondingly. With the adoption of a middle hot melting connecting piece connecting mode, the construction is quick, the connecting quality is high, the requirement on high strength of a joint is met, and the uniformity of a joint material, a structure and a pipe body is ensured. In addition, the hot melting connecting structure and the manufacturing method have the characteristics of high efficiency, low energy consumption and operation simplicity, the manual disadvantages of operating personnel are reduced substantially, the working efficiency is increased by above two times, and the operation is more environment-friendly and safer.

Description

technical field [0001] The invention relates to a connection structure of hot water supply pipes, in particular to a heat-melt connection structure between metal-plastic composite pipes and a manufacturing method thereof. Background technique [0002] In the connection construction of metal composite pressure pipe fittings of polyurethane foam prefabricated direct-buried metal-plastic composite pipes in the urban heating secondary pipe network, the connection method of hot-melt socket connection pipes is firstly melted and then socketed, and the construction is difficult. It is easily affected by external environmental factors and the skills of construction personnel. [0003] One interface needs to be welded twice, and pure plastic pipe fittings are light in weight. Due to the addition of excessive joints, the diameter of the pipe fusion joint will shrink, which will affect the flow of the pipeline, increase the uncertainty of the sealing performance of the capacity joint, ...

AI Technical Summary

Problems solved by technology

[0004] The invention designs a hot-melt connection structure between metal-plastic composite pipes and its manufacturing method, which solves the technical problems that the existing pipe connectors and connection methods have relatively high construction difficulty, and are easily affected by external environmental factors and construction personnel. The impact of skills, and the shrinkage of the pipe melting joint

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